It has all to do with the freedom people enjoy here. In most cases it's all positive, but in some cases the freedom that Bitcoin gets praised for, is also a factor that might work against Bitcoin. The only thing that isn't centralized are the coins that you have stored offline. Everything else is centralized in one way or another, but hey, in most cases we still have the freedom to go with whatever we want. No one forces us to do something we don't want.